Port 1334writesrv

writesrv is an obscure service assigned to TCP and UDP port 1334.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

Technical Details

what runs on :1334

writesrv is registered on port :1334 over tcp and udp to Marvin Toungate. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :1334

this machine

# linux
sudo ss -tulpn 'sport = :1334'

# macos / bsd
sudo lsof -nP -i :1334

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :1334

another host

nmap -sV -p T:1334 <host>
sudo nmap -sU -sV -p U:1334 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :1334

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

no security notes recorded for :1334 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :1334
service: writesrv
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The writesrv assignment covers both TCP and UDP port 1334 and is registered to Marvin Toungate. There is no additional registry information describing a specific product or deployment context.
lookups: 0rank 993
added: 2026-08-22
updated: 2026-08-22
references: IANA service name registry — port 1334

Something wrong?

This record is maintained by the engineers who use port 1334. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-08-22.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

browse categories →

ports registered around :1334, by lookups.

port	service	proto	category	risk	views
:1337	PowerFolder P2P	TCP	Security	caution	27.1k
:1311	Dell OpenManage	TCPtls	Remote Access	caution	26.6k
:1337	Men & Mice DNS	UDP	Network Services	safe	24.8k
:1337	WASTE Encrypted Sharing	TCP	Security	caution	22.9k
:1293	IPSec	TCPUDPtls	Security	caution	17.8k
:1270	SCOM Agent	TCPUDP	Network Services	caution	15.6k
:1313	Xbiim Canvii Server	TCP	Web Services	caution	12.4k
:1319	AMX ICSP	TCP	Network Services	caution	12.4k

risk mix of the 8 listed

safe13%
caution88%

2 of 8 encrypted

Port :1334writesrv

Technical Details

Security Information

Related Ports

Port 1334writesrv